公开(公告)号：US20100247976A1

公开(公告)日：2010-09-30

申请号：US12749071

申请日：2010-03-29

申请人： Takanori Mizuno ,  Junpei Fukada ,  Hiroshi Tsuchiya

发明人： Takanori Mizuno ,  Junpei Fukada ,  Hiroshi Tsuchiya

IPC分类号： G11B5/73 ,  C03C19/00

CPC分类号： G11B5/8404 ,  G11B5/7315

摘要： A glass substrate is for use in a magnetic disk. The glass substrate is formed by using a plate-like glass produced by a float method and having a pair of main surfaces. One surface of the main surfaces, which is formed with a tin layer when producing the plate-like glass by the float method, is caused to serve as a surface not for use in magnetic recording and the other surface formed with no tin layer is caused to serve as a surface for use in magnetic recording.

摘要翻译： 玻璃基板用于磁盘。 玻璃基板通过使用通过浮法制造的板状玻璃并具有一对主表面而形成。 使用通过浮法制造板状玻璃时由锡层形成的主表面的一个表面被用作不用于磁记录的表面，并且引起不形成锡层的另一表面 作为用于磁记录的表面。

公开(公告)号：US20100247977A1

公开(公告)日：2010-09-30

申请号：US12749044

申请日：2010-03-29

申请人： Hiroshi Tsuchiya ,  Junpei Fukada ,  Takanori Mizuno

发明人： Hiroshi Tsuchiya ,  Junpei Fukada ,  Takanori Mizuno

IPC分类号： G11B5/73 ,  G11B5/84 ,  B24B1/00

CPC分类号： G11B5/8404 ,  G11B5/7315

摘要： In a magnetic disk substrate having first and second chamfered faces respectively connecting between first and second main surfaces opposite to each other and an edge face located between the first and second main surfaces, the ranges of the first and second chamfered faces are specified. Specifically, the distance a from a first boundary portion being a boundary between the first main surface and the first chamfered face to a point of intersection between the first main surface and an extended line of the edge face and the distance b from a second boundary portion being a boundary between the second main surface and the second chamfered face to a point of intersection between the second main surface and an extended line of the edge face are set to satisfy a/b≧1.6.

摘要翻译： 在具有分别连接在彼此相对的第一和第二主表面之间的第一和第二倒角面以及位于第一和第二主表面之间的边缘面的磁盘基板中，规定了第一和第二倒角面的范围。 具体地说，距离第一边界部分的距离a是第一主表面和第一倒角面之间的边界到边缘面的第一主表面和延伸线之间的交点，距第二边界部分的距离b 作为第二主表面和第二倒角面之间的边界与边缘面的第二主表面和延伸线之间的相交点设定为满足a /b≥1.6。

公开(公告)号：US20100247978A1

公开(公告)日：2010-09-30

申请号：US12749021

申请日：2010-03-29

申请人： Junpei Fukada ,  Takanori Mizuno ,  Hiroshi Tsuchiya

发明人： Junpei Fukada ,  Takanori Mizuno ,  Hiroshi Tsuchiya

IPC分类号： G11B7/252 ,  B24B1/00

CPC分类号： G11B5/8404

摘要： A magnetic disk substrate manufacturing method of this invention includes a main surface polishing process that polishes disk-shaped glass substrates by the use of a polishing machine having a carrier pressed between a pair of polishing surface plates and adapted to make an orbital motion while rotating on its axis in a state of holding the disk-shaped glass substrates. In the polishing machine, the carrier is placed in a state where a plate-like member is disposed on one side of main surfaces of the disk-shaped glass substrate, so that only the other side of the main surfaces of the disk-shaped glass substrate is polished while allowing the one side of the main surfaces of the disk-shaped glass substrates to be a non-polishing main surface.

摘要翻译： 本发明的磁盘基板的制造方法包括主表面抛光工艺，其通过使用具有被压在一对抛光表面板之间的载体并且适于在旋转的同时进行轨道运动的抛光机来抛光盘形玻璃基板 其轴线处于保持盘状玻璃基板的状态。 在抛光机中，载体被放置在盘状构件设置在盘状玻璃基板的主表面的一侧的状态，从而只有盘形玻璃的主表面的另一侧 抛光基板，同时允许盘形玻璃基板的主表面的一侧为非抛光主表面。